<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <style>
        .hello {
            color: red;
        }
    </style>
</head>
<body>
  <h1 style="background-color: green">Test页面</h1>
  <p class="hello">你好</p>
</body>
</html>